"""
Utility tools used by the deep agent.

The functions are decorated with `@tool` from langchain and can be called by the agent.
"""

from langchain.tools import tool

@tool
def echo(text: str) -> str:
    """Return the same text – useful for demonstration."""
    return f"Echo: {text}"

@tool
def add(a: int, b: int) -> int:
    """Add two integers."""
    return a + b